312133213032421 has 4 divisors (see below), whose sum is σ = 340508959671744. Its totient is φ = 283757466393100.

The previous prime is 312133213032401. The next prime is 312133213032439. The reversal of 312133213032421 is 124230312331213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312133213032421 - 2¹⁹ = 312133212508133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312133213032401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14187873319645 + ... + 14187873319666.

It is an arithmetic number, because the mean of its divisors is an integer number (85127239917936).

Almost surely, 2^{312133213032421} is an apocalyptic number.

It is an amenable number.

312133213032421 is a deficient number, since it is larger than the sum of its proper divisors (28375746639323).

312133213032421 is a wasteful number, since it uses less digits than its factorization.

312133213032421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28375746639322.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 312133213032421 its reverse (124230312331213), we get a palindrome (436363525363634).

The spelling of 312133213032421 in words is "three hundred twelve trillion, one hundred thirty-three billion, two hundred thirteen million, thirty-two thousand, four hundred twenty-one".